C++ undefined symbol - c++

Question

I am creating a C++ console application where I am saving and loading a vector to a file. The file I am saving and loading has a header that has the size of the vector.
Here is my code:
void loadFromFile()
{
ifstream iStream("file.ext", ios::binary);
fileHeader_t fHeader;
iStream.read((char*)&fHeader, sizeof(fileHeader_t));
if (fHeader.magicNumber = 0xDEADBEAF)
{
appointments.resize(fHeader.appointmentCount); iStream.read((char*)&appointments[0], fHeader.appointmentCount * sizeof(appointment));
}
}
void saveToFile()
{
ofstream oStream("file.ext", ios::binary);
fileHeader_t fHeader;
fHeader.magicNumber = 0xDEADBEAF;
fHeader.appointmentCount = appointments.size();
oStream.write((char*)&fHeader, sizeof(fileHeader_t));
oStream.write((char*)&appointments[0], sizeof(appointment) * appointments.size());
}
And here is the header struct:
struct fileHeader_s
{
DWORD magicNumber;
size_t appointmentsCount;
}fileHeader_t;
I am getting the following errors:
E2379 Statement missing ;
E2451 Undefined symbol 'fHeader'
At the following lines:
fileHeader_t fHeader;
Why is this happening, and more importantly, how can I fix it?
Thanks
Update
Here is my full code:
class appointment
{
public:
appointment(string aDate, string aTime, string aType,
string aLocation, string aComments, bool aIsImportant,
string aReminderDate, string aReminderTime)
{
appDate = aDate;
appTime = aTime;
appType = aType;
appLocation = aLocation;
appComments = aComments;
appIsImportant = aIsImportant;
appReminderDate = aReminderDate;
appReminderTime = aReminderTime;
}
void setDate(string aDate)
{
appDate = aDate;
}
void setTime(string aTime)
{
appTime = aTime;
}
void setType(string aType)
{
appType = aType;
}
void setLocation(string aLocation)
{
appLocation = aLocation;
}
void setComments(string aComments)
{
appComments = aComments;
}
void setIsImportant(bool aIsImportant)
{
appIsImportant = aIsImportant;
}
void setReminderDate(string aReminderDate)
{
appReminderDate = aReminderDate;
}
void setReminderTime(string aReminderTime)
{
appReminderTime = aReminderTime;
}
string getDate()
{
return appDate;
}
string getTime()
{
return appTime;
}
string getType()
{
return appType;
}
string getLocation()
{
return appLocation;
}
string getComments()
{
return appComments;
}
bool getIsImportant()
{
return appIsImportant;
}
string getReminderDate()
{
return appReminderDate;
}
string getReminderTime()
{
return appReminderTime;
}
private:
appointment();
string appDate;
string appTime;
string appType;
string appLocation;
string appComments;
bool appIsImportant;
string appReminderDate;
string appReminderTime;
//person owner;
};
class calendar
{
public:
calendar()
{
loadFromFile();
}
~calendar()
{
saveToFile();
}
void createAppointment(string aDate, string aTime, string aType, string aLocation, string aComments, bool aIsImportant, string aReminderDate, string aReminderTime)
{
appointment newAppointment(aDate, aTime, aType, aLocation, aComments, aIsImportant, aReminderDate, aReminderTime);
appointments.push_back(newAppointment);
}
private:
vector<appointment> appointments;
string calCurrentDate;
string calCurrentTime;
void loadFromFile()
{
ifstream iStream("file.ext", ios::binary);
fileHeader_t fHeader;
iStream.read((char*)&fHeader, sizeof(fileHeader_t));
if (fHeader.magicNumber = 0xDEADBEAF)
{
appointments.resize(fHeader.appointmentCount); iStream.read((char*)&appointments[0], fHeader.appointmentCount * sizeof(appointment));
}
}
void saveToFile()
{
ofstream oStream("file.ext", ios::binary);
fileHeader_t fHeader;
fHeader.magicNumber = 0xDEADBEAF;
fHeader.appointmentCount = appointments.size();
oStream.write((char*)&fHeader, sizeof(fileHeader_t));
oStream.write((char*)&appointments[0], sizeof(appointment) * appointments.size());
}
typedef struct fileHeader_s
{
DWORD magicNumber;
size_t appointmentCount;
}fileHeader_t;
};
I am getting the following 2 errors:
[BCC32 Warning] Person.cpp(271): W8060 Possibly incorrect assignment
Full parser context
Person.cpp(245): class calendar
Person.cpp(290): decision to instantiate: void calendar::loadFromFile()
--- Resetting parser context for instantiation...
Person.cpp(267): parsing: void calendar::loadFromFile()
[BCC32 Error] vector(608): E2247 'appointment::appointment()' is not accessible
Full parser context
vector(607): decision to instantiate: void vector >::resize(unsigned int)
--- Resetting parser context for instantiation...
Person.cpp(18): #include c:\program files (x86)\embarcadero\rad studio\9.0\include\dinkumware\vector
vector(8): namespace std
vector(330): class vector<_Ty,_Ax>
vector(607): parsing: void vector >::resize(unsigned int)
Can I please have some help to fix this?

Answer 1

You are missing the typedef keyword in struct definition.
typedef struct fileHeader_s
{
}fileHeader_t;
However, in C++ it is not required for the typedef keyword. In that case, struct name is still fileHeader_s.

Answer 2

I think what you want is a typedef
typedef struct fileHeader_s
{
DWORD magicNumber;
size_t appointmentsCount;
}fileHeader_t;